第三人称单数是英语中的一种语法，也称“三单”或“单三”，用于一般现在时的句子，当动词在第三人称后时：

首先，咱们要搞清楚第一、第二、第三人称各是什么。第一人称就是“我”和“我们”。第二人称是“你”和“你们”。第三人称单数是“他”、“她”和“它”，复数则是“他们”、“她们”和“它们”。

在一般现在时中，当主语是第三人称单数时，谓语动词要用第三人称单数形式，即常在动词原形后加-s或-es。

下面我们归纳一下第三人称单数的用法：

一、人称代词he, she, it是第三人称单数。如：

He likes watching TV. 他喜欢看电视。

She has lunch at twelve. 她十二点吃午餐。

It looks like a cat. 它看起来像只猫。

二、单个人名、地名或称呼作主语；是第三人称单数。如：

①Han Mei looks like her mother. 韩梅看起来像她的母亲。

②Beijing is in China. 北京在中国。

③Uncle Wang often makes cakes. 王叔叔经常做蛋糕。

三、单数可数名词或"this/that/the+单数可数名词"作主语时，是第三人称单数。如：

①A horse is a useful animal. 马是有用的动物。

②This book is yours. 这本书是你的。

③That car is red. 那辆小汽车是红色的。

④The cat is Lucy's. 这只猫是露茜的。

四、不定代词someone, somebody, nobody, everything, something等及指示代词this, that作主语时，是第三人称单数。如：

①Everyone is here. 大家到齐了。

②There is something wrong with the watch. 这块手表有毛病。

③This is a pen. 这是一支钢笔。

④That is an eraser. 那是一块橡皮擦。

五、不可数名词作主语时为第三人称单数。如：

①The milk is in the glass. 牛奶在玻璃杯里。

②The bread is very small. 那面包很小。

六、当数字或字母作主语时，看作第三人称单数。如：

②"I" is a letter. "I"是个字母。

二、把下列动词变为第三人称单数形式。

1. clean— 2. go-- 3. have--

4. do-- 5. play-- 6. fly—

7. come— 8. brush-- 9. watch-- 10. study-- 11. ask-- 12. answer-- 13. swim-- 14. catch-- 15. write-- 16. eat-- 17. make-- 18. paint-- 19. learn-- 20. phone-- 21. run-- 22. hop-- 23. sing-- 24. pick-- 三、选出正确的答案：

1. She (like / likes) to play football.

2. He (like / likes) drinking milk.

3. I (like / likes) to watch TV.

4. We (like / likes) to play badminton.

5. They (like / likes) to sing songs.

6. She (read / reads) books every day.

7. He (play / plays) computer games every day.

8. It (listen / listens) to the radio every day.

9. Linda (draw / draws) pictures every day.

10. Jane and Linda (play / plays) football every day.

1.He often ________(have) dinner at home.

2.We _______(not watch) TV on Monday.

3.Nick _______(not go) to the zoo on Sunday.

4.______ they ________(like) the World Cup?

5.What _______they often _______(do) on Saturdays?

6._______ your parents _______(read) newspapers every day?

7.The girl _______(teach) us English on Sundays.

8.She and I ________(take) a walk together every evening.

9.There ________(be) some water in the bottle.

10.Mike _______(like) cooking.

11.They _______(have) the same hobby.

12.My aunt _______(look) after her baby carefully.

13.You always _______(do) your homework well.

14.I _______(be) ill. I’m staying in bed.

15.She _______(go) to school from Monday to Friday.

16.Liu Tao _______(do) not like PE.

17.The child often _______(watch) TV in the evening.

18.Su Hai and Su Yang _______(have) eight lessons this term

练习一、将括号里动词的适当形式填入横线上。

1.He often ________(have) dinner at home.

2.We _______(not watch) TV on Monday.

3.Nick _______(not go) to the zoo on Sunday.

4.______ they ________(like) the World Cup?

5.What _______they often _______(do) on Saturdays?

6._______ your parents _______(read) newspapers every day?

7.The girl _______(teach) us English on Sundays.

8.She and I ________(take) a walk together every evening.

9.There ________(be) some water in the bottle.

10.Mike _______(like) cooking.

11.They _______(have) the same hobby.

12.My aunt _______(look) after her baby carefully.

13.You always _______(do) your homework well.

14.I _______(be) ill. I’m staying in bed.

15.She _______(go) to school from Monday to Friday.

16.Liu Tao _______(do) not like PE.

17.The child often _______(watch) TV in the evening.

18.Su Hai and Su Yang _______(have) eight lessons this term.

19. He________ TV every evening. (watch)

20.John ________ like his father. (look)

      I ________ in the corridors. (walk)

l        He _________ in the corridors. (run)

l        She ___________ her face once a day. (wash)

l        They ____________ their teeth once a day. (brush)

l        You ___________ up your clothes once a day. (hang)

l        We ____________ our home work once a day. (finish)

l        He ____________ rubbish in the classroom. (throw)

l        She _____________ rubbish on the floor. (throw)

l        I _____________ rubbish in the bin. (throw)

l        They ___________ the table once a day. (set)

l        Peter never _________ in the corridors. (run)

l        Mary usually _________ the table. (set)

l        Pat and Ken _________ the plants in the morning. (water)

l        The boy __________ his hair once a day. (comb)

l        Miss Cheng _________ TV at home. (watch)

l        My sister __________ his schoolbag once a day. (pack)

l        My mother _________ dinner for me. (cook)

l        My parents _________ the house at Chinese New Year. (clean)

l        My teachers _________ us some gifts. (give)

l        My friends _________ the table with me. (set)

练习二、选择正确的单词填到括号里。

1.       What does Candy __________ (wants,want) to be ?

2.       You __________ (should,shouldn’t) be quiet in the library.

3.       He shouldn’t ___________ (throw,throws) rubbish on the floor.

4.       Peter ___________ (help,helps) his mother at home.

5.       She never _________ (run,runs) in the corridors.

6.       We should __________ (walks,walk) in the corridors.

7.       He _________ (don’t,doesn’t) get up early.

8.       How often __________ (do,does) your father go to bed?

练习三、将下列句子改成第三人称He的句型（看例句）

例句：I brush my teeth once a day.

---- 改：He brushes his teeth once a day.

1.I comb my hair twice a day.

2.They go to school at six in the morning.

3.You wash your face and put on your clothes.

4.When do you get up?

5.How often do you hang up your clothes?

练习四

1.       He __________(watch) TV every day.

2.       He _________(go) to school on his bike.

3.       Dad _________(wash) the dishes for us every day.

4.       My uncle _________(not go) fishing at the weekends.

5.       My brother _______(not like) playing football.

6.       The twin brother _________(enjoy) going to the concert.

7.       One of the students often __(do) his homework after 10 p.m. It is wrong.

8.       Lucy often ________(chat) with Millie.

9.       Tom usually ______(have) a fast breakfast in the morning so he ____(feel) hungry early.

10.   -_______ he ________ (go) bed early?

 ---Yes, he _______.

11.   The sunshine ________(bring) us warmth（温暖）.

12.   Sam usually _________(fly) kites with his father in May.

13.   Sometimes the little boy_________(cross) the road himself.

14.   Nick _______(miss) a turn because he is late.

15.   Sandy _______(study) harder than before.

16.   My parents often _______(let) me choose what to do.

17.   -________ Amy _________(close) the window? -No, she ________.

18.   The little girl often ________(cry).

19.   _______ she _______(help) you ________(do) some cleaning on Sunday?

20.   He often ___(do) some ____(shop) or ___(listen) to music with his family.

练习六 句型转换

1. I go to school by bus. (用He做主语)

2. Kim plays baseball very well. (变一般疑问句)

3. She plays sports every day. (变否定句)

4. David doesn’t like French. （变肯定句）

5.They like watches. (变否定句)

6.Alan doesn’t watch TV on school nights. （变肯定句）

7. We have time to do it. (变否定句)

8.John has a car. （对划线部分提问）

9. Do you have a pencil? (把主语改成she)

10.Sonia Hall likes hamburgers .(划线部分提问)

练习七、填空，根据括号内的单词写出其正确的形式。

1.  We often ______ (play) in the playground.

2.   He ______ (get) up at six o’clock.

3.  My mother __________(have) a nice book.

4.   That music ________(sound) good.

5.   ________ you ________（have） a tennis racket?

6.   Mark sometimes _____ (go) to the park with his sister.

7.   She ________（play） sports every day.

8.    _______ Mike_______ (read) English every day?

9.    Can you ________（bring） your new picture books here?

10.  ________ your friend ________（like） sports?

第三人称单数形式解析